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When phospholipid molecules are placed into water, microspheres form spontaneously. These micorspheres are called:
Early cyanobacteria evolved a form of photosynthesis that permanetly changed the earth's atmosphere by releasing which of the following gases?
An experimental test of the hypothesis to explain the origin of the first organic compounds on earth might include all of the following steps except:
inoculate with a few bacteria to get the process started
Coacervates have all of the following except
Have: 2 layer outer boundary, can divide, and are able to grow
It has been recently been discovered that enzyme-like catalysis can be carried out not only by enzymes buy also by:
Of the following primitive Earth conditions and chemical reactions, which one do biochemists know was important to the formation of amino acids and subsequent formation of complex carbon molecules that are common to life?
There had to be a reducing atmosphere rather than one with oxygen otherwise formation of those molecules would have been extremely difficult
which of the following cannot be included in the main categories of archaebacteria?
It can be: methenogens, halophiles, and thermophiles
Lacking one of the criteria to be strictly classified as living units and containing fragments of eukaryotic genomes, the viruses are included in:
none of the kingdoms
If two organisms are in the same phylum and the same family, then they also belong to the same
kingdom, order, class
The genetic alteration of a cell's genome by the introduction of foreign DNA is called
Recently a class of infectious proteins with no associated nucleic acid, have been identified. They are referred to as
The viral replication cycle that causes the host cell to burst open releasing newly assembled viruses is the __________cycle
The type of replication cycle where viruses become established as stable parts of the host cell genome is the _________cycle
The infection cycle of HIV includes all of the following steps except:
immediate killing of the host cell
Which of the following is not a form of HIV treatment
treatments: AZT , Protease inhibitors and CAF and chemokines
an example of an emerging virus (a virus in a new host) with a lethality rate in excess of 50% is
Bacteria undergo a process that produces cells that are identical. This process is called
certain bacteria can withstand drying and hotter temperatures because of their ability to form
archaebacteria differ from eubacteria in which of the following
cell wall, plasma membrane, gene translation machinery, and gene architecture
Some bacteria attach to other substrates by hair like outgrowths, which are shorter than flagella. these are called
The marine multicellular protists belonging to the larger brown algae that are responsible for most of the food production through photosynthesis in regions where they occur are called
organisms that are characterized by being unicellular, photosynthetic, and having double shells made of silica are known as
Zoomastigotes aid termites and other wood eating insects because they possess cellulose digesting enzymes. These zoomastigotes live in the
intestines of termites
protists are classified into a single kingdom because of which of the following features
eukaryotes that dont have organs
individual organisms move through the soil or other substrate to ingest bacteria, etc., till a certain ultimately becomes encysted into spores. these organisms are
cellular slime molds
Which of the following common names is mismatched with its phyla
Golden algae- Chrysophyta
these are all matched correctly
of the following statements about the fungal phylum Zygomycota, which is incorrect?
correct: sexual reproduction by fusion of gametangia,
example is bread mold,
produce sporangiophores (asexually)
Of the following statements about the fungal Phylum Ascomycota, which is incorrect
correct: yeast are unicellular members,
make reproductive structure ascus,
mold, morels, chestnut blights
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